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Finding the Fourth Proportional to 394,889.76, 544,957.20 and 225,139.68

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Solution

The fourth proportional to 394,889.76, 544,957.20 and 225,139.68 is: 310,698.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,889.76 : 544,957.20 = 225,139.68 : x
  2. Step 2: Convert to fraction form
    394,889.76/544,957.20 = 225,139.68/x
  3. Step 3: Cross multiply
    394,889.76x = 544,957.20 × 225,139.68
  4. Step 4: Simplify right side
    394,889.76x = 122,691,489,621.70
  5. Step 5: Solve for x
    x = 122,691,489,621.70/394,889.76
  6. Step 6: Final answer
    x = 310,698.08

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.